Flash diffuser



FIG. 1 is a perspective view of a flash diffuser;

FIG. 2 is a front view of the flash diffuser of FIG. 1, the rear view being a mirror image of the front view;

FIG. 3 is a right side view of the flash diffuser of FIG. 1, the left side view being a mirror image of the right side view;

FIG. 4 is a bottom view of the flash diffuser of FIG. 1; and,

FIG. 5 is a top view of the flash diffuser of FIG. 1.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for the flash diffuser, as shown and described. 